Cation-Exchange Membrane (Fumasep, F14100) for Flow Battery, Electrolzyer and Fuel Cell, CFBEFCCEMF14100
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The Fumasep F-14100 is a heavy-duty, perfluorinated cation-exchange membrane (PFSA) manufactured by Fumatech BWT. Within the Fumatech lineup, it serves as the "extra-thick" equivalent to Nafion™ 115 or 117, offering maximum durability and chemical barrier properties. The "14" in the name typically refers to its Equivalent Weight (EW) of approximately 1400 g/eq, while the "100" denotes its nominal dry thickness of 100 µm
Because the F-14100 is significantly thicker than standard fuel cell membranes (which are often 20–30 µm), it is used in "high-barrier" electrochemical processes: (1) Direct Methanol Fuel Cells (DMFC): This is the primary use case. Thinner membranes allow methanol to "crossover" from the anode to the cathode, which wastes fuel and kills performance. The 100 µm thickness of the F-14100 acts as a powerful physical barrier to keep methanol where it belongs. (2) Proton-Exchange Membrane Water Electrolysis (PEMWE): Used in systems where gas purity is the top priority. The thickness ensures that Hydrogen and Oxygen do not mix across the membrane, even under high pressure. (3) Vanadium Redox Flow Batteries (VRFB): Ideal for long-duration storage systems. It provides superior blocking of vanadium ions compared to thinner grades, leading to higher coulombic efficiency and slower self-discharge.
| Part Number | CFBEFCCEMF14100 (C-FBEFC-CEM-F14100) |
| Functional Group | Sulfonic Acid (–SO₃⁻) |
| Reinforcement | None |
| Thickness (um) | ~100 um |
| Ion Exchange Capacity (meq/g) | ~0.56-0.84 |
| Area Resistance (Ω·cm² 25℃, H₂O) | <0.25 |
| Dimensional Swelling | <16 wt% |
| Primary Applications | DMFC, PEMWE, VFRB |
| Package Grade | 10cm*10cm/pcs/pack (other sheet size of 20cm*20cm also can be supplied upon request) |
Use Note:
The F-14100 is supplied in the H+ (Proton) form and is delivered as a dry, transparent foil. (1) Removal of Backing Foil: The membrane is delivered on a clear PET backing foil. You must carefully peel the membrane away from this plastic before assembly.
(2) Activation: While it can be used "as-is," many protocols recommend a hot-acid soak to ensure maximum proton conductivity: (a) Soak in 5–10 wt% H2SO4 at 80°C for 2–4 hours. (b) Rinse multiple times with deionized water.
(3) Hydration: Always pre-soak the membrane in your target electrolyte for 24 hours before final cutting. The 100 µm film will expand significantly when wet; if you cut it dry and install it, it will wrinkle and leak once it hydrates inside the cell.
Reference:
- N. Weber, et al., Tailoring Pore Networks – Gas Diffusion Electrodes via Additive Manufacturing, Adv. Mater. Interfaces, 2023, 8, 2300720.
- X. Wei, et al., Efficient Electrocatalytic N2 Reduction on Three-Phase Interface Coupled in a Three-Compartment Flow Reactor for the Ambient NH3 Synthesis, ACS Appl. Mater. Interfaces 2021, 13, 18, 21411–21425.